How much room do I give for a limit order in order to catch a trending stock up. For example I placed a limit order for TEO at 25.60. It got filled at 25.59. Another limit order I placed was for CHL at 61.50. The order never got filled and is at 63.75 now. Should I give more room for my limit orders. For Example if the stock is at 22.14. Put a limit order for 22.75 instead of 22.30?